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The link to support the edit of 19:51, 23 October 2007 by Jmcharry that "polybutylene plumbing is no longer approved by the IPC" does not seem to support this. It simply lists amendments removing polybutylene from a table.Richardewing 09:43, 7 November 2007 (UTC)[reply]

Consider the source The favorable source (and currently the only source) listed as "Polybutylene Piping Systems - Successful in the Past, Prepared for the Future" appears to be supported by the The Polybutene Piping Systems Association. 63.253.110.195 (talk) 22:50, 10 March 2008 (UTC)[reply]

Clean-up needed here. Too many spam links, including new additions recently added and reverted.Wilson44691 (talk) 09:01, 21 July 2010 (UTC)[reply]

• Most of the sources in this article are from groups that are involved in the inspection, repair or replacement business.  —Chris Capoccia ^T⁄_C 12:43, 28 July 2010 (UTC)[reply]

currently, the article reads: "Polybutylene plumbing was used in 6 to 10 million homes built in the United States from 1970 to the mid-1990s" and cites Pacific Crest Inspections. Hensler is a much more reliable source and explains on page 394, note 3 that U.S. Brass claimed 6 million in an advertisement, but Shell Oil in an official response to an interogatory estimated 4.7 million.  —Chris Capoccia ^T⁄_C 12:06, 29 July 2010 (UTC)[reply]

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“Not be confused” should be: not to be 71.82.118.133 (talk) 14:14, 7 December 2022 (UTC)[reply]